docs: def get(self, run_id, metric_id):
          """
          Read a metric of the given id and run.
  
          The returned object has the following format (timestamps are datetime
           objects).
  
          .. code::
  
              {"steps": [0,1,20,40,...],
              "timestamps": [timestamp1,timestamp2,timestamp3,...],
              "values": [0,1 2,3,4,5,6,...],
              "name": "name of the metric",
              "metric_id": "metric_id",
              "run_id": "run_id"}
  
          :param run_id: ID of the Run that the metric belongs to.
          :param metric_id: The ID fo the metric.
          :return: The whole metric as specified.
  
          :raise NotFoundError
          """
          run_id = self._parse_run_id(run_id)
          query = self._build_query(run_id, metric_id)
          row = self._read_metric_from_db(metric_id, run_id, query)
          metric = self._to_intermediary_object(row)
          return metric